1. You can store items in the warehouse into a Shelter near Kozlak NPCs, or in treasure chests in the city. But if your town will take over another organization, then you can't take something from the chests.2. Npc trading in the game yet. But you can trade items through the markets in the cities. The market can be crafted and put on the territory of your city, or take advantage of the market in cities belonging to other organizations.